Improvement in spring-hinges



y N STTTNTR STTTTNGf-HTNGTT- j PATEMED AUG 1 1871 ATTEST l UNITED STATESEATEET OEEIcE.

IMPROVEMENT IN SPRING-HINGES.

Specification forming part of Letters Patent No. 117,691, dated August1, 1871.

To all whom t may concern:

Be it known that I, NATHANIEL SEHNER, of Hagerstown, in the county ofWashington and State of Maryland, have invented a certain Improvement inSpring-Hinges', and I do hereby declare that the following' is a full,clear, and exact description thereof, reference being had to the annexeddrawing making part of this specification, in wl1ieh Figure l is afrontV elevation of the hinge as it appears when the shutter or gateturning on it is thrown open all the way. Fig 2. is a horizontal sectionon line as w of Fig. l. Fig. 3 is a similar section, showing the hingein its closed position. Fig. 4 is a perspective view of that part of thehinge which is screwed to the 'post or windowframe and carries thespring. Fig. 5 is a 4perspective View of the part which is screwed tothe door or shutter.

The same letters of reference are used in all the figures in thedesignation of identical parts.

This invention relates to an improvement in that class of hinges whichis more especially designed for use in connection with window-shutters,and in which a spring carried by the stationary part acts upon a cam ofthe oscillating part to hold the shutter firmly in any one of severalpositions without other fastenings. The improvement consists in a novelconstruction, to be hereinafter more specifically pointed out, of thestationary part of the hinge to provide for the use of a straight-platespring, which, when inserted, is held in position solely by its owntension, so that it can be applied by any person, whether skilled ornot, and a new one substituted with ease andthe least possible expense.

The stationary part of the hinge consists of a plate, A, with an arm,A1, upon the outer enlarged end of which the pintle A2 is formed, asusual. Directly above the arm a recess is formed in the edge of theplate nearest the pintle, in height about equal to the length of thelatter. Along the horizontal edges of this'recess run flanges a and a',across the back of the plate, extending some distance beyond its inneredges.

A vertical bar or plate, A3, connects these flanges, as best seen inFig. 4, 'so as to forni a pocket for the reception of the spring C. Thethickened inner edge c3 of this plate is slightly in advance ofthe edgea2 of the recess in the plate A, and standing back of the latter anarrow throat is formed at that point for the passage of the end ofthespring behind the plate A. The edge c2 y is beveled, as shown, to guidethe spring to the throat, and the edge a3 may be rounded, as indicated.To prevent the spring from entering the wood of the frame or post,either on driving it into place, or afterward by the action of the camon it, a vertical bead, a4, is cast upon the back of the plate A to forman abutment for the end of the spring, uniting at the ends with theiianges c al. rIhe socket of the part B of the hinge has a doublewingedcam, B', standing transverse to the plate, and projecting so far thatwhen its hat side comes in contact with the spring the latter willremain suciently bent to be firmly braced between the edges a2 and a3,and prevent any endwise movement by the action of the cam on it inopening and closing the shutter. The spring G is a straight plate cut toproper length to bear against the cam in every position of the shutter.No rivets or bolts being used to fasten it any person is enabled toapply it, and should one be injured or broken accidentally a new one canbe substituted without the aid of a mechanic.

What I claim as my invention, and desire to secure by Letters Patent,is-

The plate A, when constructed with a bar, A3, the beveled edge ai ofwhich forms a throat with the beveled edge c2 of the plate, and avertical bead, a4, all substantially as and for the purpose set forth.

In testimony that I claim the foregoing as my invention I have hereuntoset my name this 10th day of March, A. D. 1871, in presence of twosubscribing witnesses.

Witnesses: NATHANIEL SEHNER.

J. W. MISTER, Jos. R. EnsoN.

